Workmate (9)
I believe the answer is:
colleague
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">workmate</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for colleague that I've seen before include "Partner's" , "Fellow worker" , "Fellow-worker" , "Business co-worker" , "China, perhaps" .)